Because we can know where to go and what to do when we are in a strange place.
1. When the pupil is aware of the problem & difficulties created by the problem but he feels difficult to define it & to understand it, i.e., when the pupil is familiar with the presence of the problem & its nature but he is unable to face the problem due to this temporary tension & distraction. 2. When pupil suffers the main mal-adjustment problem or some handicap which is temporary & which needs careful long due diagnosis by an expert.